Deploy rasa in cloud

hi, i want to deploy my chatbot in cloud for making it a public website. I was using Watson Assistant, in that case for exemple:
username = {username}
password = {password}
conversationWorkspace = {workspace_id}
and the API url: ‘https://gateway.watsonplatform.net/assistant/api

how can i do this on rasa and where can I find the rasa API URL?

tks!